CN210293461U - Temperature measuring system for drilling printed circuit board - Google Patents

Abstract

The utility model provides a printed circuit board drilling temperature measurement system, include: the device comprises a machine table, a drilling main shaft, a temperature adjusting device, a driving device and an infrared thermal imaging device; a printed circuit board is placed on the machine table; the drilling main shaft comprises a main shaft body and a main shaft shell, and the main shaft body drives a drill bit to drill the printed circuit board along the Z axis; the temperature adjusting device comprises a temperature adjuster and a transparent cover connected to the spindle shell, the transparent cover is provided with an accommodating cavity communicated with the temperature adjuster and a bottom hole communicated with the accommodating cavity, and the drill bit is positioned in the accommodating cavity and can extend out of the bottom hole; the driving device is connected with the main shaft body and drives the main shaft body to move along the X axis and the Y axis relative to the machine table; the infrared thermal imaging device comprises a mounting bracket connected to the spindle shell, an infrared thermal imager arranged on the mounting bracket and a filter cover movably arranged on the infrared thermal imager and used for filtering external stray light. The accuracy of the drilling temperature measurement of the printed circuit board is improved.

Description

Temperature measuring system for drilling printed circuit board

Technical Field

The utility model belongs to the technical field of circuit board micro-machining temperature measurement, more specifically say, relate to a printed circuit board drilling temperature measurement system.

Background

Drilling micropores on a printed circuit board, which is a necessary process for applying the micropores to electronic components and is a key step; the printed circuit board generally comprises glass fiber cloth, resin, copper foil and other filling materials, therefore, in the drilling process, a drill needs to alternately cut the copper foil, the glass fiber cloth, a resin matrix solidified around the glass fiber cloth, the filling materials and the like in a very short time, which belongs to a very complicated nonlinear cutting process, and especially for the acquisition and control of the drilling temperature of the printed circuit board, the collection and control of the drilling temperature of the printed circuit board are always the key points and difficulties of experimental temperature measurement.

At present, the measurement of the drilling temperature can be roughly divided into a contact type thermocouple measurement and a non-contact type thermal imager measurement, but because the size of a drill bit drilled by a micropore of a printed circuit board is too small, the drill bit belongs to the scope of mesoscopic size, a thermocouple cannot be arranged on a drill tip or a drill body, and even if the thermocouple is arranged at the micropore, a larger error is caused; therefore, for the drill bit with the diameter less than 0.5mm, the non-contact infrared thermometry is mostly adopted for measuring the drilling temperature. The process of infrared temperature measurement is essentially a process of converting a received thermal radiation signal emitted by an object to be measured into an electric signal by a thermal infrared imager, and then presenting the electric signal to display equipment in a pseudo color signal mode, so as to obtain an infrared thermal image.

However, due to the fact that the structural design of the existing equipment for measuring the drilling temperature of the printed circuit board is not reasonable, infrared energy radiated by a heating object in an external environment can easily enter the thermal infrared imager to cause distortion of an obtained thermal infrared image, and the final temperature measurement value is deviated from a true value to a large extent due to large temperature fluctuation of a laboratory during multi-hole drilling.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a printed circuit board drilling temperature measurement system to solve present printed circuit board drilling temperature measurement equipment's the not good enough technical problem of measurement accuracy.

In order to achieve the above object, the utility model adopts the following technical scheme: there is provided a printed circuit board drilling temperature measurement system comprising: the device comprises a machine table, a drilling main shaft, a temperature adjusting device, a driving device and an infrared thermal imaging device;

a printed circuit board is placed on the machine table; the drilling main shaft comprises a main shaft body and a main shaft shell, and a drill bit is arranged on the main shaft body and drives the drill bit to drill the printed circuit board along a Z axis; the temperature adjusting device comprises a temperature adjuster and a transparent cover connected to the spindle shell, the transparent cover is provided with an accommodating cavity communicated with the temperature adjuster and a bottom hole communicated with the accommodating cavity, and the drill bit is positioned in the accommodating cavity and can extend out of the bottom hole; the driving device is connected to the main shaft body and drives the main shaft body to move along an X axis and a Y axis relative to the machine table, and the X axis, the Y axis and the Z axis are mutually vertical in pairs; the infrared thermal imaging device comprises a mounting bracket connected to the spindle shell, a thermal infrared imager arranged on the mounting bracket, and a filter cover movably arranged on the thermal infrared imager and used for filtering external stray light.

Furthermore, the transparent cover comprises a left sub cover and a right sub cover which are respectively positioned at two opposite sides of the spindle shell, and the left sub cover and the right sub cover are magnetically attracted and enclosed to form the accommodating cavity and the bottom hole.

Furthermore, a plurality of clamping grooves distributed at intervals along the Z axis are formed in the spindle shell; the left branch cover and the right branch cover are provided with clamping bulges which can be in sealed clamping connection with the clamping grooves.

Furthermore, the left sub cover is connected with the right sub cover in a magnetic attraction manner.

Furthermore, the driving device comprises a first driver, a second driver, a first transmission mechanism connected to the spindle housing, and a second transmission mechanism connected to the first transmission mechanism, wherein the first driver is connected to the first transmission mechanism and drives the first transmission mechanism to move along the X axis, and the second driver is connected to the second transmission mechanism and drives the second transmission mechanism to move along the Y axis.

Furthermore, the first transmission mechanism comprises a nut block connected with the spindle housing, a first transmission block and a second transmission block which are positioned on two opposite sides of the machine table, a first guide rod connected between the first transmission block and the second transmission block, and a first lead screw rotatably connected between the first transmission block and the second transmission block;

the first driver is connected to the first lead screw and drives the first lead screw to rotate, the nut block is spirally sleeved on the periphery of the first lead screw and movably sleeved on the periphery of the first guide rod, and the first lead screw and the first guide rod extend along the X axis.

Furthermore, the second transmission mechanism comprises a second lead screw which is rotatably connected to the machine table and a second guide rod which is connected to the machine table;

the first transmission block is connected with the second transmission block, the first transmission block is spirally sleeved on the periphery of the second lead screw, and the second transmission block is movably sleeved on the periphery of the second guide rod.

Furthermore, the filter cover comprises a filter part movably sleeved on the periphery of the thermal infrared imager and a stop part connected to the filter part and abutted against the tail end of the thermal infrared imager.

Furthermore, the mounting bracket comprises a connecting frame connected with the spindle housing, an adjusting bracket rotatably connected with the connecting frame, and a support rotatably connected with the adjusting bracket, and the thermal infrared imager is arranged on the support.

Further, the frame frequency range of the thermal infrared imager is 1500fps to 3000 fps.

Implement the embodiment of the utility model provides a, will have following beneficial effect:

the temperature measuring system for drilling the printed circuit board provided by the embodiment of the utility model regulates and controls the temperature in the accommodating cavity by the temperature regulator, so that the temperature of the accommodating cavity tends to be constant when the drill bit retreats to the accommodating cavity after drilling one hole, namely, by additionally arranging the temperature adjusting device, the temperature of the drill bit in the environment retreated back after drilling one hole tends to be constant, the condition of the environment temperature of the drill bit for drilling each hole can be ensured to be consistent no matter how the temperature in the laboratory fluctuates, the error of the measured value finally measured and calculated due to the influence of the environment temperature on the surface temperature of the drill bit is avoided, therefore, the measured value is closer to the true value, the influence on the temperature detection precision due to large temperature fluctuation of a laboratory is avoided, the error of the external environment temperature on the temperature measurement result during porous drilling is effectively reduced, and the accuracy of the temperature measurement of the drilling of the printed circuit board is improved; by additionally arranging the filter cover on the thermal infrared imager, external stray light which possibly enters the thermal infrared imager is filtered, and the thermal image obtained due to the fact that infrared energy radiated by a heating object in an external environment enters the thermal infrared imager is prevented from deviating, so that the measurement accuracy of the printed circuit board drilling temperature measurement system is further improved; still through setting up thermal infrared imager on the installing support who connects in main shaft shell for when drilling main shaft transform drilling position, need not the relative position of independent adjustment thermal infrared imager and drill bit again, greatly practiced thrift the experimental process, shortened temperature measurement time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

FIG. 1 is a schematic diagram of a drilling temperature measurement system for a printed circuit board according to an embodiment;

FIG. 2 is an exploded view of the printed circuit board drilling temperature measurement system provided in FIG. 1;

FIG. 3 is a schematic view showing a part of the structure of the PCB drilling temperature measuring system I shown in FIG. 1;

FIG. 4 is a schematic view of a second partial structure of the printed circuit board drilling temperature measurement system provided in FIG. 1;

fig. 5 is a schematic structural diagram of a temperature adjustment device according to an embodiment.

Wherein, in the figures, the respective reference numerals:

10. a printed circuit board drilling temperature measurement system;

100. a machine platform;

200. drilling a main shaft; 210. a main shaft body; 220. a spindle housing; 221. a card slot;

300. a drive device; 310. a first transmission mechanism; 311. a nut block; 312. a first transmission block; 313. a second transmission block; 314. a first lead screw; 315. a first guide bar; 321. a second lead screw; 322. a second guide bar; 320. a second transmission mechanism;

400. a temperature adjustment device; 410. a transparent cover; 411. an accommodating chamber; 412. a bottom hole; 413. a left branch cover; 414. a right sub-cover; 415. a clamping bulge; 420. a temperature regulator;

500. an infrared thermal imaging device; 510. a thermal infrared imager; 511. an optical imaging objective lens; 520. mounting a bracket; 521. a connecting frame; 522. adjusting the bracket; 5221. a first support arm; 5222. a second support arm; 523. a support; 530. a light filtering cover; 531. a light filter portion; 532. a connecting portion; 533. a stopper portion;

600. a base;

700. a controller;

20. a printed circuit board; 30. a drill bit.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

It should be noted that, in the utility model discloses in, two liang mutually perpendicular in X axle, Y axle and Z axle, the plane that the X axle belonged to jointly with the Y axle is the XY plane, and the plane that the Z axle belonged to jointly with the Y axle is the ZY plane, and the plane that the Z axle belonged to jointly with the X axle is the ZX plane, can understand ground, two liang mutually perpendicular in XY plane, ZX plane and ZY plane.

Referring to fig. 1 to 5, a system 10 for measuring drilling temperature of a printed circuit board according to the present invention will now be described. The system 10 for measuring the drilling temperature of the printed circuit board comprises a machine table 100, a drilling spindle 200, a driving device 300, a temperature adjusting device 400 and an infrared thermal imaging device 500.

The machine 100 is used for placing the printed circuit board 20 to be drilled. The drilling spindle 200 includes a spindle body 210 for coupling the drill 30 and a spindle housing 220 disposed at an outer periphery of the spindle body 210; the spindle housing 220 protects the spindle body 210, so that the spindle body 210 is prevented from being easily interfered by external force during movement, or being collided or impacted to influence the movement precision; this main shaft body 210 is used for driving drill bit 30 around its self axial rotation, along its self axis removal the utility model discloses in, will be the Z axle direction with the parallel direction definition of main shaft body 210's axis, can understand ground, under this main shaft body 210's driving action, drill bit 30 is along the Z axle down and around the Z axle rotatory, can drill the printed circuit board 20 that is located the drill bit 30 below.

The temperature adjusting device 400 comprises a temperature adjuster 420 and a transparent cover 410 for surrounding the drill bit 30, the transparent cover 410 is connected to the spindle housing 220, the transparent cover 410 is provided with a containing cavity 411 and a bottom hole 412 communicated with the containing cavity 411, the drill bit 30 is positioned in the containing cavity 411 and can extend out of the bottom hole 412 to perform a drilling action; the temperature regulator 420 is connected to the accommodating cavity 411 and can regulate the temperature in the accommodating cavity 411, so that when the drill 30 returns to the accommodating cavity 411 after drilling, the temperature in the accommodating cavity 411 is maintained within a small fluctuation range, preferably within a fluctuation range of 0.01 ℃ to 0.02 ℃, and understandably, the laboratory temperature is generally influenced by a plurality of uncertain factors and has large fluctuation, the temperature measuring system 10 for drilling printed circuit boards provided by the utility model regulates and controls the temperature in the accommodating cavity 411 by the temperature regulator 420, so that when the drill 30 returns to the accommodating cavity 411 after drilling one hole, the temperature in the accommodating cavity 411 tends to be constant, namely, by adding the temperature regulating device 400, the temperature in the environment where the drill returns after drilling one hole tends to be constant, and no matter how the temperature in the laboratory fluctuates, the environmental temperature conditions of drilling each hole by the drill 30 can be ensured to be consistent, the measured value that the ambient temperature produced the influence and finally calculated to drill bit 30 surface temperature forms the error to avoid the ambient temperature to produce to the measured value that makes the measured value more approach to the true value, avoided having avoided the influence that brings the temperature detection precision because of laboratory temperature fluctuation is big, the error that the external ambient temperature brought the temperature measurement result when effectively having reduced porous drilling, and then improved printed circuit board drilling temperature measurement's accuracy.

The driving device 300 is connected to the main shaft housing 220, and is configured to drive the drilling main shaft 200 to move along the X axis and the Y axis relative to the machine 100, so that a single main shaft body 210 can correspond to different positions of the drilling printed circuit board 20, wherein the X axis, the Y axis, and the Z axis are mutually perpendicular in pairs.

The infrared thermal imaging device 500 comprises a thermal infrared imager 510, a mounting bracket 520 and a filter cover 530; it is understood that the thermal infrared imager 510 works on the following principle: receiving infrared radiation energy of a detected object by using an infrared detector and an optical imaging objective lens and reflecting the infrared radiation energy distribution condition on a photosensitive element of the infrared detector so as to obtain an infrared thermograph, wherein the infrared thermograph corresponds to a thermal distribution field on the surface of the object, in a popular way, an infrared thermal imager 510 converts invisible infrared energy emitted by the object into visible thermographs, and different colors on the thermographs represent different temperatures of the detected object; in the embodiment, the thermal infrared imager 510 is disposed on the mounting bracket 520, the mounting bracket 520 is connected to the spindle housing 220, the thermal infrared imager 510 is used for acquiring a thermal image when the drill bit 30 drills the printed circuit board 20, and the filter cover 530 is disposed on the thermal infrared imager 510 to filter out external stray light that may enter the thermal infrared imager 510, so as to prevent infrared energy radiated by a heating object in an external environment from entering the optical imaging objective 511 of the thermal infrared imager 510, so as to cause deviation of the acquired thermal image, thereby further improving the measurement accuracy of the printed circuit board drilling temperature measurement system 10.

In addition, since the mounting bracket 520 is disposed on the spindle housing, the thermal infrared imager 500 moves along with the movement of the spindle housing 220, so that the thermal infrared imager 510 can be accurately aligned with the position of the drill bit 30 no matter the drilling spindle 200 moves to any position under the driving of the driving device 300, without separately moving the position of the thermal infrared imager 500 or adjusting the relative positions of the thermal infrared imager 510 and the drill bit 30; that is, when porous drilling, the user need not when boring different hole sites, because of need adjusting infrared thermal imaging device 500's position and shut down to drilling temperature's measurement efficiency when having greatly promoted porous drilling has alleviateed the work load of printed circuit board drilling temperature measurement experiment, has effectively improved the experiment degree of difficulty.

To sum up, the embodiment of the present invention provides a temperature measuring system 10 for drilling printed circuit board, which makes the temperature of the drill 30 in the environment returning to after drilling a hole tend to be constant by adding the temperature adjusting device 400, thereby avoiding the influence on the temperature detection precision due to the large temperature fluctuation in the laboratory, effectively reducing the error of the external environment temperature to the temperature measurement result during the multi-hole drilling, and further improving the accuracy of the temperature measurement; by arranging the thermal infrared imager 510 on the mounting bracket 520 connected to the main shaft housing, when the drilling position of the drilling main shaft 200 is changed, the relative position of the thermal infrared imager 510 and the drill bit 30 does not need to be adjusted independently, so that the experimental procedure is greatly saved, and the temperature measurement time is shortened; by additionally arranging the filter cover on the thermal infrared imager 520, external stray light which possibly enters the thermal infrared imager 510 is filtered, and the infrared energy radiated by a heating object in the external environment is prevented from entering the optical imaging objective 511 of the thermal infrared imager 510, so that the obtained thermal image is prevented from deviating, and the measurement accuracy of the drilling temperature measurement system 10 for the printed circuit board is further improved.

In order to improve the drilling efficiency and the temperature detection efficiency, and to enlarge the temperature data collection amount per unit time, the number of the drilling spindles 200 may be increased, for example, 2, 4, or 6, which is not limited herein.

In addition, since the transparent cover 410 is a transparent piece, the direct observation of the drilling process and the overall shooting of the infrared thermal imaging device 500 by the experimenter are not affected by the addition of the transparent cover 410.

In this embodiment, the diameter of the drill is less than or equal to 0.5mm, preferably 0.1mm, 0.2mm, 0.3mm, 0.5 mm.

In this embodiment, the accommodating cavity 411 is communicated with the temperature regulator 420 through a ventilation pipeline, the working principle of the temperature regulator 420 is the same as the cooling and heating principle of a common air conditioner, and the temperature in the accommodating cavity 411 can be regulated to a required temperature value or temperature range. In other embodiments of the present invention, the specific structure of the temperature regulator 420 and the position thereof may be determined according to specific needs, and is not limited herein.

Referring to fig. 3 to 5, in an embodiment, the transparent cover 410 includes a left sub-cover 413 and a right sub-cover 414, where the left sub-cover 413 and the right sub-cover 414 are respectively located at two opposite sides of the spindle housing, and are magnetically coupled together to form the accommodating cavity 411 and the bottom hole 412. In this way, the user can easily remove the transparent cover 410 to facilitate the removal and installation of the drill 30; of course, in other embodiments of the present invention, the left sub-cover 413 and the right sub-cover 414 can be detachably connected by other methods, such as a bolt connection, a snap connection, etc., which are not limited herein.

Referring to fig. 1 to 3, in an embodiment, the spindle housing 220 is provided with a plurality of slots 221 spaced along the Z-axis direction, and at least one of the left sub-cover 413 and the right sub-cover 414 is provided with a locking protrusion 415 capable of being locked with any slot 221 in a sealing manner. So, not only improved translucent cover 410 and spindle housing 220 complex stability, can also adjust the relative position of translucent cover 410 and spindle housing 220 as required, thereby the space size that can be used for holding drill bit 30 of adjustment translucent cover 410, that is, through adjusting this translucent cover 410 and the draw-in groove 221 joint of difference, make translucent cover 410 can be applicable to the drill bit 30 of different length, make the drill bit 30 of different length can all be surrounded by translucent cover 410 after withdrawing from printed circuit board 20, and then effectively enlarge this printed circuit board drilling temperature measurement system 10's application scope.

Preferably, in this embodiment, the slot 221 is preferably a circular slot, the left sub-cover 413 and the right sub-cover 414 are both provided with a retaining protrusion 415, and each retaining protrusion 415 is in a shape of a half circle.

Referring to fig. 1 to 2, in an embodiment, the driving device 300 includes a first driver (not shown), a second driver (not shown), a first transmission mechanism 310 and a second transmission mechanism 320, wherein the first transmission mechanism 310 is connected to the first driver and the spindle housing 220, and under the action of the first driver, the first transmission mechanism 310 drives the drilling spindle 200 and the infrared thermal imaging device 500 to move along the X-axis direction; the second transmission mechanism 320 is connected to the first transmission mechanism 310 and the second driver, and under the driving action of the second driver, the second transmission mechanism 320 drives the first transmission mechanism 310 to move along the Y-axis direction, so as to drive the drilling spindle 200 and the infrared thermal imaging device 500 to move along the Y-axis direction.

In an embodiment, the second transmission mechanism 320 includes a second lead screw 321 and a second guide rod 322 respectively located at two opposite sides of the machine 100, wherein the second guide rod 322 is connected to the machine 100, the second lead screw 321 is rotatably connected to the machine 100, the second lead screw 321 and the second guide rod 322 both extend along the Y-axis direction, the second lead screw 321 is connected to a second driver, and the second driver is configured to drive the second lead screw 321 to rotate; the first transmission mechanism 310 includes a nut block 311 connected to the spindle housing 220, a first transmission block 312 disposed at the periphery of the second lead screw 321 in a threaded manner, a second transmission block 313 movably disposed at the periphery of the second guide rod 322 in a sleeved manner, and a first lead screw 314 and a first guide rod 315 connected between the first transmission block 312 and the second transmission block 313, wherein the first transmission block 312 and the second transmission block 313 are fixedly connected from the lower side of the machine 100, the first lead screw 314 and the first guide rod 315 both extend along the X-axis direction, the nut block 311 is disposed at the periphery of the first lead screw 314 in a threaded manner, and the first guide rod 315 is disposed at the periphery of the first guide rod 315 in a movable manner. Thus, the first driver drives the first lead screw 314 to rotate, and then drives the nut block 311 to move along the X-axis direction, so as to drive the drilling spindle 200 and the infrared thermal imaging device 500 to move along the X-axis direction; the second driver drives the second screw 321 to rotate, and then drives the first transmission block 312 and the second transmission block 313 to move along the Y-axis direction, so as to drive the first screw 314, the first guide rod 315, the drilling spindle 200, and the infrared thermal imaging apparatus 500 to move along the Y-axis.

It is to be understood that, in the above-described embodiment, both the first guide rod 315 and the second guide rod 322 perform a guiding function.

Preferably, in this embodiment, the first driver and the second driver are both motors.

Referring to fig. 2 to 4, in an embodiment, the mounting bracket 520 is used for adjusting the position of the thermal infrared imager 510 in the YZ plane, so as to adjust the shooting position and the shooting angle of the thermal infrared imager 510. Specifically, the mounting bracket 520 includes a connecting bracket 521 fixedly secured to the outer periphery of the spindle housing 220, an adjusting bracket 522 rotatably connected to the connecting bracket 521, and a support 523 rotatably connected to the adjusting bracket 522, wherein the thermal infrared imager 510 is disposed on the support 523. In this embodiment, the connecting frame 521 and the adjusting bracket 522, and the adjusting bracket 522 and the support 523 are rotatably connected through bolts (not shown), and the detachable locking nuts (not shown) lock the relative positions of the connecting frame 521, so that a user pushes the adjusting bracket 522 to rotate the position of the adjustable thermal infrared imager 510 in the YZ plane relative to the connecting frame 521, and the user pushes the support 523 to rotate the shooting angle of the adjustable thermal infrared imager 510 on the drill bit 30 relative to the adjusting bracket 522, thereby greatly improving the convenience of position adjustment and shooting angle adjustment of the thermal infrared imager 510, effectively improving the experimental efficiency, and supporting the user to design the experimental design of multi-angle shooting and temperature measurement. It can be understood that the thermal image obtained by shooting from more angles can be calculated to obtain a measured value closer to the true value, so that the accuracy and reliability of the printed circuit board drilling temperature measuring system 10 are further improved.

Preferably, in this embodiment, the adjusting bracket 522 includes a first arm 5221 and a second arm 5222, one end of the first arm 5221 is rotatably connected to the connecting frame 521, and the other end is rotatably connected to one end of the second arm 5222, and the other end of the second arm 5222 is rotatably connected to the support 523. Thus, the user can adjust the position of the thermal infrared imager 510 in the YZ plane by pushing the adjusting bracket 522 to rotate relative to the connecting bracket 521 or pushing the second arm 5222 to rotate relative to the first arm 5221, so that the degree of freedom of position adjustment of the thermal infrared imager 510 is increased, and the flexibility of position adjustment of the thermal infrared imager 510 is further optimized.

In the present embodiment, the thermal infrared imager 510 is a high-speed thermal infrared imager 510, and the frame rate ranges from 1500fps to 3000 fps. Therefore, more thermal images can be obtained in unit time, and the temperature detection result is further optimized.

In the present embodiment, the filter cover 530 is movably sleeved on the periphery of the thermal infrared imager 510 for blocking external stray light that may enter the optical imaging objective 511 of the thermal infrared imager 510, so as to block infrared energy radiated by a heating object in an external environment from entering the optical imaging objective 511 of the thermal infrared imager 510.

Specifically, the filter cover 530 includes a light filtering portion 531, a connecting portion 532 and a stopping portion 533, the light filtering portion 531 is movably sleeved on the periphery of the thermal infrared imager 510, the stopping portion 533 is located at an end of the thermal infrared imager 510 away from the optical imaging objective 511, that is, the stopping portion 533 is located at a tail end of the thermal infrared imager 510, and the connecting portion 532 connects the light filtering portion 531 and the stopping portion 533. When the filter cover 530 needs to be used for filtering light, the stopping portion 533 is pushed to enable the filter cover 530 to move towards the direction of the optical imaging objective 511 of the thermal infrared imager 510 until the stopping portion 533 abuts against the tail end of the thermal infrared imager 510, so that external stray light can be prevented from entering the optical imaging objective 511 of the thermal infrared imager 510; as can be appreciated, the stopper 533 here serves as a limit to prevent the filter cover 530 from sliding off the thermal infrared imager 510; when the filter mask 530 is not needed to filter light, the stopping portion 533 can be pulled back, so that the filter mask 530 does not occupy too much space, and it can be understood that, when the filter mask 530 is used, a user does not need to perform an additional installation procedure for the filter mask 530 in the embodiment, and does not need to store the filter mask 530 after use, thereby facilitating the optimization of the convenience of use and the convenience of storage of the printed circuit board drilling temperature measurement system 10, and the filter mask 530 has a simple structure and a low cost.

Preferably, in the present embodiment, the optical filter 531 covers the upper side and the left and right sides of the optical imaging objective 511 of the thermal infrared imager 510 in front of the optical axis, that is, the lower side thereof in front of the optical axis is hollowed out. Thus, the possibility that the filter cover 530 collides with the printed circuit board 20 when the thermal infrared imager 510 changes the shooting angle can be reduced; it can be understood that, since the printed circuit board 20 is often disposed below the thermal infrared imager 510, external stray light mostly enters the optical imaging objective 511 from the upper side and the left and right sides in front of the optical axis of the optical imaging objective 511, and even though the lower side of the filter cover 530 is hollow, the filter cover does not affect the thermal infrared imager 510 to perform a good filtering function, so as to reduce the influence of the external stray light on the temperature measurement result, and meanwhile, the material and the cost can be saved.

Further, please refer to fig. 1 to 5, the drilling temperature measuring system 10 of the embodiment of the present invention further includes a base 600 for setting the machine table 100, and a controller 700 disposed on the base 600 and electrically connected to the driving device 300, the drilling spindle 200, the temperature adjusting device 400 and the thermal infrared imager 500, wherein the controller 700 can be used to control the actions of the first driver, the second driver and the spindle body 210, and can also control and adjust the working parameters of the temperature adjuster 420 and the thermal infrared imager 510, in this embodiment, the controller 700 is preferably a PLC programmable controller; in the present embodiment, the temperature regulator 420 is disposed on the base 600.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. Printed circuit board drilling temperature measurement system, its characterized in that includes: the device comprises a machine table, a drilling main shaft, a temperature adjusting device, a driving device and an infrared thermal imaging device;

a printed circuit board is placed on the machine table; the drilling main shaft comprises a main shaft body and a main shaft shell, and a drill bit is arranged on the main shaft body and drives the drill bit to drill the printed circuit board along a Z axis; the temperature adjusting device comprises a temperature adjuster and a transparent cover connected to the spindle shell, the transparent cover is provided with an accommodating cavity communicated with the temperature adjuster and a bottom hole communicated with the accommodating cavity, and the drill bit is positioned in the accommodating cavity and can extend out of the bottom hole; the driving device is connected to the main shaft body and drives the main shaft body to move along an X axis and a Y axis relative to the machine table, and the X axis, the Y axis and the Z axis are mutually vertical in pairs; the infrared thermal imaging device comprises a mounting bracket connected to the spindle shell, a thermal infrared imager arranged on the mounting bracket, and a filter cover movably arranged on the thermal infrared imager and used for filtering external stray light.

2. The printed circuit board drilling temperature measurement system of claim 1, wherein: the transparent cover comprises a left sub cover and a right sub cover which are respectively positioned at two opposite sides of the spindle shell, the left sub cover is detachably connected with the right sub cover, and the left sub cover and the right sub cover are enclosed to form the accommodating cavity and the bottom hole.

3. The printed circuit board drilling temperature measurement system of claim 2, wherein: a plurality of clamping grooves distributed at intervals along the Z axis are formed in the main shaft shell; the left branch cover and the right branch cover are provided with clamping bulges which can be in sealed clamping connection with the clamping grooves.

4. The printed circuit board drilling temperature measurement system of claim 2, wherein: the left sub cover is connected with the right sub cover in a magnetic attraction manner.

5. Printed circuit board drilling temperature measurement system according to any of claims 1 to 4, characterized in that: the driving device comprises a first driver, a second driver, a first transmission mechanism connected to the spindle shell and a second transmission mechanism connected to the first transmission mechanism, the first driver is connected to the first transmission mechanism and drives the first transmission mechanism to move along the X axis, and the second driver is connected to the second transmission mechanism and drives the second transmission mechanism to move along the Y axis.

6. The printed circuit board drilling temperature measurement system of claim 5, wherein: the first transmission mechanism comprises a nut block connected with the spindle shell, a first transmission block and a second transmission block which are positioned on two opposite sides of the machine table, a first guide rod connected between the first transmission block and the second transmission block, and a first lead screw rotatably connected between the first transmission block and the second transmission block;

the first driver is connected to the first lead screw and drives the first lead screw to rotate, the nut block is spirally sleeved on the periphery of the first lead screw and movably sleeved on the periphery of the first guide rod, and the first lead screw and the first guide rod extend along the X axis.

7. The printed circuit board drilling temperature measurement system of claim 6, wherein: the second transmission mechanism comprises a second lead screw which is rotationally connected with the machine table and a second guide rod which is connected with the machine table;

the first transmission block is connected with the second transmission block, the first transmission block is spirally sleeved on the periphery of the second lead screw, and the second transmission block is movably sleeved on the periphery of the second guide rod.

8. Printed circuit board drilling temperature measurement system according to any of claims 1 to 4, characterized in that: the filter cover comprises a filter part movably sleeved on the periphery of the thermal infrared imager and a stop part connected to the filter part and abutted against the tail end of the thermal infrared imager.

9. Printed circuit board drilling temperature measurement system according to any of claims 1 to 4, characterized in that: the mounting support comprises a connecting frame connected with the spindle shell, an adjusting support rotationally connected with the connecting frame, and a support rotationally connected with the adjusting support, and the thermal infrared imager is arranged on the support.

10. Printed circuit board drilling temperature measurement system according to any of claims 1 to 4, characterized in that: the frame frequency range of the thermal infrared imager is 1500fps to 3000 fps.

Images